1 /* -*- c-file-style: "linux" -*-
3 rsync -- fast file replication program
5 Copyright (C) 1996-2000 by Andrew Tridgell
6 Copyright (C) Paul Mackerras 1996
7 Copyright (C) 2002 by Martin Pool <mbp@samba.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 extern int log_format_has_i;
29 extern int log_format_has_o_or_i;
30 extern int daemon_log_format_has_i;
34 extern int do_progress;
36 extern int relative_paths;
37 extern int keep_dirlinks;
38 extern int preserve_links;
39 extern int preserve_devices;
40 extern int preserve_hard_links;
41 extern int preserve_perms;
42 extern int preserve_uid;
43 extern int preserve_gid;
44 extern int preserve_times;
45 extern int omit_dir_times;
46 extern int delete_before;
47 extern int delete_during;
48 extern int delete_after;
50 extern int ignore_errors;
51 extern int remove_sent_files;
52 extern int delay_updates;
53 extern int update_only;
54 extern int opt_ignore_existing;
56 extern int make_backups;
57 extern int csum_length;
58 extern int ignore_times;
60 extern OFF_T max_size;
61 extern int io_timeout;
63 extern int sock_f_out;
64 extern int ignore_timeout;
65 extern int protocol_version;
66 extern int fuzzy_basis;
67 extern int always_checksum;
68 extern char *partial_dir;
69 extern char *basis_dir[];
70 extern int compare_dest;
73 extern int whole_file;
75 extern int read_batch;
76 extern int only_existing;
77 extern int orig_umask;
78 extern int safe_symlinks;
79 extern long block_size; /* "long" because popt can't set an int32. */
80 extern int max_delete;
81 extern int force_delete;
82 extern int one_file_system;
83 extern struct stats stats;
84 extern dev_t filesystem_dev;
85 extern char *backup_dir;
86 extern char *backup_suffix;
87 extern int backup_suffix_len;
88 extern struct file_list *the_file_list;
89 extern struct filter_list_struct server_filter_list;
93 static int deletion_count = 0; /* used to implement --max-delete */
96 static int is_backup_file(char *fn)
98 int k = strlen(fn) - backup_suffix_len;
99 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
103 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
104 * force_delete is set, this will delete recursively as long as DEL_NO_RECURSE
105 * is not set in the flags. */
106 static int delete_item(char *fname, int mode, int flags)
108 struct file_list *dirlist;
109 char buf[MAXPATHLEN];
110 int j, dlen, zap_dir, ok;
113 if (!S_ISDIR(mode)) {
114 if (max_delete && ++deletion_count > max_delete)
116 if (make_backups && (backup_dir || !is_backup_file(fname)))
117 ok = make_backup(fname);
119 ok = robust_unlink(fname) == 0;
121 if (!(flags & DEL_TERSE))
122 log_delete(fname, mode);
125 if (errno == ENOENT) {
129 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
134 zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
135 && !(flags & DEL_NO_RECURSE);
136 if ((max_delete && ++deletion_count > max_delete)
137 || (dry_run && zap_dir)) {
140 } else if (make_backups && !backup_dir && !is_backup_file(fname)
141 && !(flags & DEL_FORCE_RECURSE))
142 ok = make_backup(fname);
144 ok = do_rmdir(fname) == 0;
146 if (!(flags & DEL_TERSE))
147 log_delete(fname, mode);
150 if (errno == ENOENT) {
154 if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) {
155 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
159 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
162 dlen = strlcpy(buf, fname, MAXPATHLEN);
163 save_filters = push_local_filters(buf, dlen);
165 dirlist = get_dirlist(buf, dlen, 0);
166 for (j = dirlist->count; j--; ) {
167 struct file_struct *fp = dirlist->files[j];
169 if (fp->flags & FLAG_MOUNT_POINT)
173 if (delete_item(buf, fp->mode, flags & ~DEL_TERSE) != 0) {
180 pop_local_filters(save_filters);
182 if (max_delete && ++deletion_count > max_delete)
185 if (do_rmdir(fname) == 0) {
186 if (!(flags & DEL_TERSE))
187 log_delete(fname, mode);
188 } else if (errno != ENOTEMPTY && errno != ENOENT) {
189 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
198 /* This function is used to implement per-directory deletion, and is used by
199 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
200 * MAXPATHLEN buffer with the name of the directory in it (the functions we
201 * call will append names onto the end, but the old dir value will be restored
203 static void delete_in_dir(struct file_list *flist, char *fbuf,
204 struct file_struct *file)
206 static int min_depth = MAXPATHLEN, cur_depth = -1;
207 static void *filt_array[MAXPATHLEN/2+1];
208 static int already_warned = 0;
209 struct file_list *dirlist;
210 char delbuf[MAXPATHLEN];
215 while (cur_depth >= min_depth)
216 pop_local_filters(filt_array[cur_depth--]);
217 min_depth = MAXPATHLEN;
223 rprintf(FINFO, "delete_in_dir(%s)\n", safe_fname(fbuf));
226 maybe_send_keepalive();
228 if (file->dir.depth >= MAXPATHLEN/2+1)
229 return; /* Impossible... */
231 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
235 "IO error encountered -- skipping file deletion\n");
240 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
241 pop_local_filters(filt_array[cur_depth--]);
242 cur_depth = file->dir.depth;
243 if (min_depth > cur_depth)
244 min_depth = cur_depth;
246 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
248 if (link_stat(fbuf, &st, keep_dirlinks) < 0)
251 if (one_file_system && file->flags & FLAG_TOP_DIR)
252 filesystem_dev = st.st_dev;
254 dirlist = get_dirlist(fbuf, dlen, 0);
256 /* If an item in dirlist is not found in flist, delete it
257 * from the filesystem. */
258 for (i = dirlist->count; i--; ) {
259 if (!dirlist->files[i]->basename)
261 if (flist_find(flist, dirlist->files[i]) < 0) {
262 int mode = dirlist->files[i]->mode;
263 f_name_to(dirlist->files[i], delbuf);
264 if (delete_item(delbuf, mode, DEL_FORCE_RECURSE) < 0)
272 /* This deletes any files on the receiving side that are not present on the
273 * sending side. This is used by --delete-before and --delete-after. */
274 static void do_delete_pass(struct file_list *flist)
276 char fbuf[MAXPATHLEN];
279 if (dry_run > 1) /* destination doesn't exist yet */
282 for (j = 0; j < flist->count; j++) {
283 struct file_struct *file = flist->files[j];
285 if (!(file->flags & FLAG_DEL_HERE))
288 f_name_to(file, fbuf);
289 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
290 rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
292 delete_in_dir(flist, fbuf, file);
294 if (do_progress && !am_server)
295 rprintf(FINFO, " \r");
298 static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
301 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
304 if (am_root && preserve_uid && st->st_uid != file->uid)
307 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
314 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
315 int32 iflags, uchar fnamecmp_type, char *xname)
318 if (S_ISREG(file->mode) && file->length != st->st_size)
319 iflags |= ITEM_REPORT_SIZE;
320 if (!(iflags & ITEM_NO_DEST_AND_NO_UPDATE)) {
321 int keep_time = !preserve_times ? 0
322 : S_ISDIR(file->mode) ? !omit_dir_times
323 : !S_ISLNK(file->mode);
325 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time)
326 || (keep_time && file->modtime != st->st_mtime))
327 iflags |= ITEM_REPORT_TIME;
328 if (preserve_perms && file->mode != st->st_mode)
329 iflags |= ITEM_REPORT_PERMS;
330 if (preserve_uid && am_root && file->uid != st->st_uid)
331 iflags |= ITEM_REPORT_OWNER;
332 if (preserve_gid && file->gid != GID_NONE
333 && st->st_gid != file->gid)
334 iflags |= ITEM_REPORT_GROUP;
337 iflags |= ITEM_IS_NEW;
340 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
341 || (xname && *xname)) && !read_batch) {
342 if (protocol_version >= 29) {
344 write_int(sock_f_out, ndx);
345 write_shortint(sock_f_out, iflags);
346 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
347 write_byte(sock_f_out, fnamecmp_type);
348 if (iflags & ITEM_XNAME_FOLLOWS)
349 write_vstring(sock_f_out, xname, strlen(xname));
351 log_item(file, &stats, iflags, xname);
356 /* Perform our quick-check heuristic for determining if a file is unchanged. */
357 static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
359 if (st->st_size != file->length)
362 /* if always checksum is set then we use the checksum instead
363 of the file time to determine whether to sync */
364 if (always_checksum && S_ISREG(st->st_mode)) {
365 char sum[MD4_SUM_LENGTH];
366 file_checksum(fn, sum, st->st_size);
367 return memcmp(sum, file->u.sum, protocol_version < 21 ? 2
368 : MD4_SUM_LENGTH) == 0;
377 return cmp_modtime(st->st_mtime, file->modtime) == 0;
382 * set (initialize) the size entries in the per-file sum_struct
383 * calculating dynamic block and checksum sizes.
385 * This is only called from generate_and_send_sums() but is a separate
386 * function to encapsulate the logic.
388 * The block size is a rounded square root of file length.
390 * The checksum size is determined according to:
391 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
392 * provided by Donovan Baarda which gives a probability of rsync
393 * algorithm corrupting data and falling back using the whole md4
396 * This might be made one of several selectable heuristics.
398 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
404 blength = block_size;
405 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
406 blength = BLOCK_SIZE;
411 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
412 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
413 blength = MAX_BLOCK_SIZE;
418 if (len < (int64)blength * blength)
421 } while (c >= 8); /* round to multiple of 8 */
422 blength = MAX(blength, BLOCK_SIZE);
426 if (protocol_version < 27) {
427 s2length = csum_length;
428 } else if (csum_length == SUM_LENGTH) {
429 s2length = SUM_LENGTH;
433 int b = BLOCKSUM_BIAS;
434 for (l = len; l >>= 1; b += 2) {}
435 for (c = blength; c >>= 1 && b; b--) {}
436 /* add a bit, subtract rollsum, round up. */
437 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
438 s2length = MAX(s2length, csum_length);
439 s2length = MIN(s2length, SUM_LENGTH);
443 sum->blength = blength;
444 sum->s2length = s2length;
445 sum->count = (len + (blength - 1)) / blength;
446 sum->remainder = (len % blength);
448 if (sum->count && verbose > 2) {
450 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
451 (double)sum->count, (long)sum->remainder, (long)sum->blength,
452 sum->s2length, (double)sum->flength);
458 * Generate and send a stream of signatures/checksums that describe a buffer
460 * Generate approximately one checksum every block_len bytes.
462 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
465 struct map_struct *mapbuf;
466 struct sum_struct sum;
469 sum_sizes_sqroot(&sum, len);
472 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
476 write_sum_head(f_out, &sum);
478 for (i = 0; i < sum.count; i++) {
479 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
480 char *map = map_ptr(mapbuf, offset, n1);
481 uint32 sum1 = get_checksum1(map, n1);
482 char sum2[SUM_LENGTH];
485 full_write(f_copy, map, n1);
487 get_checksum2(map, n1, sum2);
491 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
492 (double)i, (double)offset, (long)n1,
493 (unsigned long)sum1);
495 write_int(f_out, sum1);
496 write_buf(f_out, sum2, sum.s2length);
506 /* Try to find a filename in the same dir as "fname" with a similar name. */
507 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
509 int fname_len, fname_suf_len;
510 const char *fname_suf, *fname = file->basename;
511 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
512 int j, lowest_j = -1;
514 fname_len = strlen(fname);
515 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
517 for (j = 0; j < dirlist->count; j++) {
518 struct file_struct *fp = dirlist->files[j];
519 const char *suf, *name;
523 if (!S_ISREG(fp->mode) || !fp->length
524 || fp->flags & FLAG_NO_FUZZY)
529 if (fp->length == file->length
530 && fp->modtime == file->modtime) {
533 "fuzzy size/modtime match for %s\n",
540 suf = find_filename_suffix(name, len, &suf_len);
542 dist = fuzzy_distance(name, len, fname, fname_len);
543 /* Add some extra weight to how well the suffixes match. */
544 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
547 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
548 name, (int)(dist>>16), (int)(dist&0xFFFF));
550 if (dist <= lowest_dist) {
559 void check_for_finished_hlinks(int itemizing, enum logcode code)
561 struct file_struct *file;
564 while ((ndx = get_hlink_num()) != -1) {
565 if (ndx < 0 || ndx >= the_file_list->count)
568 file = the_file_list->files[ndx];
569 if (!file->link_u.links)
572 hard_link_cluster(file, ndx, itemizing, code);
576 static int phase = 0;
578 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
579 * make sure it exists, and has the right permissions/timestamp info. For
580 * all other non-regular files (symlinks, etc.) we create them here. For
581 * regular files that have changed, we try to find a basis file and then
582 * start sending checksums.
584 * Note that f_out is set to -1 when doing final directory-permission and
585 * modification-time repair. */
586 static void recv_generator(char *fname, struct file_struct *file, int ndx,
587 int itemizing, int maybe_PERMS_REPORT,
588 enum logcode code, int f_out)
590 static int missing_below = -1, excluded_below = -1;
591 static char *fuzzy_dirname = "";
592 static struct file_list *fuzzy_dirlist = NULL;
593 struct file_struct *fuzzy_file = NULL;
594 int fd = -1, f_copy = -1;
595 STRUCT_STAT st, real_st, partial_st;
596 struct file_struct *back_file = NULL;
597 int statret, real_ret, stat_errno;
598 char *fnamecmp, *partialptr, *backupptr = NULL;
599 char fnamecmpbuf[MAXPATHLEN];
607 flist_free(fuzzy_dirlist);
608 fuzzy_dirlist = NULL;
611 if (missing_below >= 0) {
619 rprintf(FINFO, "recv_generator(%s,%d)\n",
620 safe_fname(fname), ndx);
623 if (server_filter_list.head) {
624 if (excluded_below >= 0) {
625 if (file->dir.depth > excluded_below)
629 if (check_filter(&server_filter_list, fname,
630 S_ISDIR(file->mode)) < 0) {
631 if (S_ISDIR(file->mode))
632 excluded_below = file->dir.depth;
636 "skipping server-excluded file \"%s\"\n",
643 if (missing_below >= 0 && file->dir.depth <= missing_below) {
651 if (fuzzy_basis && S_ISREG(file->mode)) {
652 char *dn = file->dirname ? file->dirname : ".";
653 if (fuzzy_dirname != dn
654 && strcmp(fuzzy_dirname, dn) != 0) {
656 flist_free(fuzzy_dirlist);
657 fuzzy_dirlist = get_dirlist(dn, -1, 1);
662 statret = link_stat(fname, &st,
663 keep_dirlinks && S_ISDIR(file->mode));
667 if (only_existing && statret == -1 && stat_errno == ENOENT) {
668 /* we only want to update existing files */
670 rprintf(FINFO, "not creating new file \"%s\"\n",
676 if (statret == 0 && !preserve_perms
677 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
678 /* if the file exists already and we aren't perserving
679 * permissions then act as though the remote end sent
680 * us the file permissions we already have */
681 file->mode = (file->mode & ~CHMOD_BITS)
682 | (st.st_mode & CHMOD_BITS);
685 if (S_ISDIR(file->mode)) {
686 /* The file to be received is a directory, so we need
687 * to prepare appropriately. If there is already a
688 * file of that name and it is *not* a directory, then
689 * we need to delete it. If it doesn't exist, then
690 * (perhaps recursively) create it. */
691 if (statret == 0 && !S_ISDIR(st.st_mode)) {
692 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
696 if (dry_run && statret != 0 && missing_below < 0) {
697 missing_below = file->dir.depth;
700 if (itemizing && f_out != -1) {
701 itemize(file, ndx, statret, &st,
702 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
704 if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) {
705 if (!relative_paths || errno != ENOENT
706 || create_directory_path(fname, orig_umask) < 0
707 || do_mkdir(fname, file->mode) < 0) {
708 rsyserr(FERROR, errno,
709 "recv_generator: mkdir %s failed",
713 if (set_perms(fname, file, statret ? NULL : &st, 0)
714 && verbose && code && f_out != -1)
715 rprintf(code, "%s/\n", safe_fname(fname));
716 if (delete_during && f_out != -1 && !phase && dry_run < 2
717 && (file->flags & FLAG_DEL_HERE))
718 delete_in_dir(the_file_list, fname, file);
722 if (max_size && file->length > max_size) {
724 rprintf(FINFO, "%s is over max-size\n",
730 if (preserve_links && S_ISLNK(file->mode)) {
732 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
735 "ignoring unsafe symlink %s -> \"%s\"\n",
737 safe_fname(file->u.link));
742 char lnk[MAXPATHLEN];
745 if (!S_ISDIR(st.st_mode)
746 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
748 /* A link already pointing to the
749 * right place -- no further action
751 if (strcmp(lnk, file->u.link) == 0) {
753 itemize(file, ndx, 0, &st, 0,
756 set_perms(fname, file, &st,
761 /* Not the right symlink (or not a symlink), so
763 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
765 if (!S_ISLNK(st.st_mode))
768 if (do_symlink(file->u.link,fname) != 0) {
769 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
770 full_fname(fname), safe_fname(file->u.link));
772 set_perms(fname,file,NULL,0);
774 itemize(file, ndx, statret, &st,
775 ITEM_LOCAL_CHANGE, 0, NULL);
777 if (code && verbose) {
778 rprintf(code, "%s -> %s\n", safe_fname(fname),
779 safe_fname(file->u.link));
781 if (remove_sent_files && !dry_run) {
783 SIVAL(numbuf, 0, ndx);
784 send_msg(MSG_SUCCESS, numbuf, 4);
791 if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
793 st.st_mode != file->mode ||
794 st.st_rdev != file->u.rdev) {
795 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
797 if (!IS_DEVICE(st.st_mode))
800 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
802 (int)file->mode, (int)file->u.rdev);
804 if (do_mknod(fname,file->mode,file->u.rdev) != 0) {
805 rsyserr(FERROR, errno, "mknod %s failed",
808 set_perms(fname,file,NULL,0);
810 itemize(file, ndx, statret, &st,
811 ITEM_LOCAL_CHANGE, 0, NULL);
813 if (code && verbose) {
814 rprintf(code, "%s\n",
820 itemize(file, ndx, statret, &st, 0, 0, NULL);
821 set_perms(fname, file, &st, maybe_PERMS_REPORT);
826 if (preserve_hard_links && hard_link_check(file, ndx, HL_CHECK_MASTER))
829 if (!S_ISREG(file->mode)) {
830 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
835 if (opt_ignore_existing && statret == 0) {
837 rprintf(FINFO, "%s exists\n", safe_fname(fname));
841 if (update_only && statret == 0
842 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
844 rprintf(FINFO, "%s is newer\n", safe_fname(fname));
849 fnamecmp_type = FNAMECMP_FNAME;
851 if (statret == 0 && !S_ISREG(st.st_mode)) {
852 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
858 if (statret != 0 && basis_dir[0] != NULL) {
863 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
864 basis_dir[i], fname);
865 if (link_stat(fnamecmpbuf, &st, 0) < 0
866 || !S_ISREG(st.st_mode))
868 switch (match_level) {
874 if (!unchanged_file(fnamecmpbuf, file, &st))
882 if (!unchanged_attrs(file, &st))
889 } while (basis_dir[++i] != NULL);
892 if (i != best_match) {
894 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
895 basis_dir[i], fname);
896 if (link_stat(fnamecmpbuf, &st, 0) < 0) {
903 if (link_dest && match_level == 3) {
904 if (hard_link_one(file, ndx, fname, -1, &st,
906 itemizing && verbose > 1,
910 rsyserr(FINFO, errno, "link %s => %s",
911 full_fname(fnamecmpbuf),
917 if (match_level == 2) {
918 /* Copy the file locally. */
919 if (copy_file(fnamecmpbuf, fname, file->mode) < 0) {
921 rsyserr(FINFO, errno,
922 "copy_file %s => %s",
923 full_fname(fnamecmpbuf),
930 itemize(file, ndx, 0, &st,
931 ITEM_LOCAL_CHANGE, 0,
933 } else if (verbose && code) {
934 rprintf(code, "%s\n",
937 set_perms(fname, file, NULL,
939 if (preserve_hard_links
940 && file->link_u.links) {
941 hard_link_cluster(file, ndx,
947 } else if (compare_dest || match_level == 1) {
948 fnamecmp = fnamecmpbuf;
957 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
958 && link_stat(partialptr, &partial_st, 0) == 0
959 && S_ISREG(partial_st.st_mode)) {
961 goto prepare_to_open;
965 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
966 int j = find_fuzzy(file, fuzzy_dirlist);
968 fuzzy_file = fuzzy_dirlist->files[j];
969 f_name_to(fuzzy_file, fnamecmpbuf);
971 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
972 safe_fname(fname), safe_fname(fnamecmpbuf));
974 st.st_size = fuzzy_file->length;
976 fnamecmp = fnamecmpbuf;
977 fnamecmp_type = FNAMECMP_FUZZY;
982 if (preserve_hard_links && hard_link_check(file, ndx, HL_SKIP))
984 if (stat_errno == ENOENT)
987 rsyserr(FERROR, stat_errno,
988 "recv_generator: failed to stat %s",
994 if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
996 else if (fnamecmp_type == FNAMECMP_FUZZY)
998 else if (unchanged_file(fnamecmp, file, &st)) {
999 if (fnamecmp_type == FNAMECMP_FNAME) {
1001 itemize(file, ndx, real_ret, &real_st,
1004 set_perms(fname, file, &st, maybe_PERMS_REPORT);
1005 if (preserve_hard_links && file->link_u.links)
1006 hard_link_cluster(file, ndx, itemizing, code);
1009 /* Only --compare-dest gets here. */
1010 itemize(file, ndx, real_ret, &real_st,
1011 ITEM_NO_DEST_AND_NO_UPDATE, 0, NULL);
1018 fnamecmp = partialptr;
1019 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1023 if (dry_run || read_batch || whole_file)
1027 int j = flist_find(fuzzy_dirlist, file);
1028 if (j >= 0) /* don't use changing file as future fuzzy basis */
1029 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1033 fd = do_open(fnamecmp, O_RDONLY, 0);
1036 rsyserr(FERROR, errno, "failed to open %s, continuing",
1037 full_fname(fnamecmp));
1039 /* pretend the file didn't exist */
1040 if (preserve_hard_links && hard_link_check(file, ndx, HL_SKIP))
1042 statret = real_ret = -1;
1046 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1047 if (!(backupptr = get_backup_name(fname))) {
1051 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
1053 goto pretend_missing;
1055 if (robust_unlink(backupptr) && errno != ENOENT) {
1056 rsyserr(FERROR, errno, "unlink %s",
1057 full_fname(backupptr));
1062 if ((f_copy = do_open(backupptr,
1063 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1064 rsyserr(FERROR, errno, "open %s",
1065 full_fname(backupptr));
1070 fnamecmp_type = FNAMECMP_BACKUP;
1074 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1075 safe_fname(fnamecmp), (double)st.st_size);
1079 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1082 write_int(f_out, ndx);
1084 int iflags = ITEM_TRANSFER;
1085 if (always_checksum)
1086 iflags |= ITEM_REPORT_CHECKSUM;
1087 if (fnamecmp_type != FNAMECMP_FNAME)
1088 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1089 if (fnamecmp_type == FNAMECMP_FUZZY)
1090 iflags |= ITEM_XNAME_FOLLOWS;
1091 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1092 fuzzy_file ? fuzzy_file->basename : NULL);
1096 if (preserve_hard_links && file->link_u.links)
1097 hard_link_cluster(file, ndx, itemizing, code);
1103 if (statret != 0 || whole_file) {
1104 write_sum_head(f_out, NULL);
1108 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1112 set_perms(backupptr, back_file, NULL, 0);
1114 rprintf(FINFO, "backed up %s to %s\n",
1115 safe_fname(fname), safe_fname(backupptr));
1124 void generate_files(int f_out, struct file_list *flist, char *local_name)
1127 char fbuf[MAXPATHLEN];
1128 int itemizing, maybe_PERMS_REPORT;
1130 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1131 int need_retouch_dir_perms = 0;
1132 int save_only_existing = only_existing;
1133 int save_opt_ignore_existing = opt_ignore_existing;
1134 int save_do_progress = do_progress;
1135 int save_make_backups = make_backups;
1137 allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2;
1138 lull_mod = allowed_lull * 5;
1140 if (protocol_version >= 29) {
1142 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1143 code = daemon_log_format_has_i ? 0 : FLOG;
1144 } else if (am_daemon) {
1145 itemizing = daemon_log_format_has_i && !dry_run;
1146 maybe_PERMS_REPORT = PERMS_REPORT;
1147 code = itemizing || dry_run ? FCLIENT : FINFO;
1148 } else if (!am_server) {
1149 itemizing = log_format_has_i;
1150 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1151 code = itemizing ? 0 : FINFO;
1154 maybe_PERMS_REPORT = PERMS_REPORT;
1159 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1160 (long)getpid(), flist->count);
1163 if (delete_before && !local_name && flist->count > 0)
1164 do_delete_pass(flist);
1170 rprintf(FINFO, "delta-transmission %s\n",
1172 ? "disabled for local transfer or --whole-file"
1176 if (protocol_version < 29)
1179 for (i = 0; i < flist->count; i++) {
1180 struct file_struct *file = flist->files[i];
1182 if (!file->basename)
1185 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1186 file, i, itemizing, maybe_PERMS_REPORT, code,
1189 /* We need to ensure that any dirs we create have writeable
1190 * permissions during the time we are putting files within
1191 * them. This is then fixed after the transfer is done. */
1192 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1194 int mode = file->mode | S_IWUSR; /* user write */
1195 char *fname = local_name ? local_name : fbuf;
1196 if (do_chmod(fname, mode & CHMOD_BITS) < 0) {
1197 rsyserr(FERROR, errno,
1198 "failed to modify permissions on %s",
1201 need_retouch_dir_perms = 1;
1204 if (preserve_hard_links)
1205 check_for_finished_hlinks(itemizing, code);
1207 if (allowed_lull && !(i % lull_mod))
1208 maybe_send_keepalive();
1210 maybe_flush_socket();
1212 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1214 delete_in_dir(NULL, NULL, NULL);
1217 csum_length = SUM_LENGTH;
1218 only_existing = max_size = opt_ignore_existing = 0;
1219 update_only = always_checksum = size_only = 0;
1221 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1223 /* We expect to just sit around now, so don't exit on a timeout.
1224 * If we really get a timeout then the other process should exit. */
1228 rprintf(FINFO,"generate_files phase=%d\n",phase);
1230 write_int(f_out, -1);
1232 /* files can cycle through the system more than once
1233 * to catch initial checksum errors */
1234 while ((i = get_redo_num(itemizing, code)) != -1) {
1235 struct file_struct *file = flist->files[i];
1236 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1237 file, i, itemizing, maybe_PERMS_REPORT, code,
1242 only_existing = save_only_existing;
1243 opt_ignore_existing = save_opt_ignore_existing;
1244 make_backups = save_make_backups;
1247 rprintf(FINFO,"generate_files phase=%d\n",phase);
1249 write_int(f_out, -1);
1250 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1251 if (protocol_version >= 29 && !delay_updates)
1252 write_int(f_out, -1);
1254 /* Read MSG_DONE for the redo phase (and any prior messages). */
1255 get_redo_num(itemizing, code);
1257 if (protocol_version >= 29) {
1260 rprintf(FINFO, "generate_files phase=%d\n", phase);
1262 write_int(f_out, -1);
1263 /* Read MSG_DONE for delay-updates phase & prior messages. */
1264 get_redo_num(itemizing, code);
1267 do_progress = save_do_progress;
1268 if (delete_after && !local_name && flist->count > 0)
1269 do_delete_pass(flist);
1271 if ((need_retouch_dir_perms || need_retouch_dir_times)
1272 && !list_only && !local_name && !dry_run) {
1274 /* Now we need to fix any directory permissions that were
1275 * modified during the transfer and/or re-set any tweaked
1276 * modified-time values. */
1277 for (i = 0; i < flist->count; i++) {
1278 struct file_struct *file = flist->files[i];
1279 if (!file->basename || !S_ISDIR(file->mode))
1281 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1283 recv_generator(f_name(file), file, i, itemizing,
1284 maybe_PERMS_REPORT, code, -1);
1285 if (allowed_lull && !(++j % lull_mod))
1286 maybe_send_keepalive();
1288 maybe_flush_socket();
1291 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1293 if (max_delete > 0 && deletion_count > max_delete) {
1295 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1296 deletion_count - max_delete);
1297 io_error |= IOERR_DEL_LIMIT;
1301 rprintf(FINFO,"generate_files finished\n");